SyberTiger
Well-Known Member
- Joined
- May 18, 2007
- Messages
- 767
- Reaction score
- 52
- City, State
- Orlando
- Year, Model & Trim Level
- 2002 Limited 4x4 4.6L
I've had idling problems on several occasions. It appeared the problem was a failing IAC. I replaced it with an Advanced Auto BWD made IAC. This seemed to fix my idling problem. Six months later, my idling problem was back. From what I read about aftermarket IACs I decided my BWD part failured. For a quick sanity check I returned the BWD part to swap it for a new BWD part. The idle problem became even worse. So, I dug some more and decided it was the EGR port hole in the throttle body that was plugged up and needed cleaning. You can read about that solution HERE.
Also, as part of my "fix" I returned the BWD IAC part back to Advanced Auto for a refund and I replaced it with an Motorcraft OEM IAC. My idle was restored and everything was wonderful with the world. Fast forward 8 month later and AGAIN I'm having idling problems. So I returned the IAC and got a new Motorcraft IAC. It fixed the problem somewhat but for a couple of weeks then...you guessed it...idle problems reared their ugly head again. So now, I'm thinking I have yet another bad IAC. I return it and now I'm on my third Motorcraft IAC. The newest IAC once again fixes my idle problem. That brings me to today. After two months on my third Motorcraft IAC and 6th IAC (including the original and BWD parts) total I'm having idle problems again.
Just to clarify, my current idle problem is that the when the vehicle is warmed up and the tranny is in PARK or IDLE the engine is idling at around 1800 to 2000 RPM. When you put it in DRIVE or REVERSE obviously it's not a good thing at that RPM and you can feel the car wanting to move forward when at a stop light.
It has become apparent that this is NOT an IAC problem. There is no way my luck is that bad. So, my question to those who have similar IAC problems what else should I be looking for? Is there a control module for the IAC that goes bad? I cleaned the MAF sensor but that really has nothing to do with idling anyway.
Also, as part of my "fix" I returned the BWD IAC part back to Advanced Auto for a refund and I replaced it with an Motorcraft OEM IAC. My idle was restored and everything was wonderful with the world. Fast forward 8 month later and AGAIN I'm having idling problems. So I returned the IAC and got a new Motorcraft IAC. It fixed the problem somewhat but for a couple of weeks then...you guessed it...idle problems reared their ugly head again. So now, I'm thinking I have yet another bad IAC. I return it and now I'm on my third Motorcraft IAC. The newest IAC once again fixes my idle problem. That brings me to today. After two months on my third Motorcraft IAC and 6th IAC (including the original and BWD parts) total I'm having idle problems again.
Just to clarify, my current idle problem is that the when the vehicle is warmed up and the tranny is in PARK or IDLE the engine is idling at around 1800 to 2000 RPM. When you put it in DRIVE or REVERSE obviously it's not a good thing at that RPM and you can feel the car wanting to move forward when at a stop light.
It has become apparent that this is NOT an IAC problem. There is no way my luck is that bad. So, my question to those who have similar IAC problems what else should I be looking for? Is there a control module for the IAC that goes bad? I cleaned the MAF sensor but that really has nothing to do with idling anyway.